VALVE NOZZLE ( VERSIONS ) Russian patent published in 2004 - IPC

FIELD: mechanical engineering; engine.

SUBSTANCE: invention relates to valves with electromagnetic drive used in fuel equipment of internal combustion engines and methods of making of design members of said valves. Valve with electromagnetic drive, mainly, valve nozzle for fuel injection systems of internal combustion engines, has longitudinal axis, electromagnetic circuit, at least one coil, core used as inner pole and armature, and also electromagnetic casa enclosing the coil at least over part of its perimeter. Armature provides opening and closing of valve by lifting it from and pressing to seat, respectively. Case of electromagnet has middle zone forming its side surface to which fastening sections adjoin from both sides in axial direction. Outer diameter of fastening sections is smaller than outer diameter of middle zone forming side surface of case, and it can be made by rolling flexible metal sheet blank. Fastening sections are sectionalized. Method of manufacture of valve electromagnet case, mainly for valve with electromagnetic drive with case of electromagnet enclosing the coil over at least part of perimeter comes to the following: during first stage of manufacturing metal sheet blank of definite form is made of metal sheet. Said blanc is provided with middle zone and two extreme zone adjoining middle zone along first extension line and located opposite to each other. Extreme zone along second extension lines orientated square to first extension line project beyond middle zone, and have several cavities. During second stage of manufacture said metal sheet blanc is rolled or bent into ring. During third stage extreme zones are subjected to plastic metal working to form smaller outer diameter. Width of cavities is decreased to minimum size and thus case of electromagnet is formed with middle zone forming its side surface with fastening sections adjoining from two opposite sides, outer diameter of said sections being less than outer diameter of said middle zone forming side surface of case. Invention excludes forming of chips and scratches in process of making and assembling and provides reliable fixing of electromagnet case in required position in valve owing to preliminary compression of fastening section operating on principle of collet.

EFFECT: improved quality and reliability of fastening of electromagnet case iv required position.

12 cl, 3 dwg